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|Honda Creates a New IMA System to be Installed in the All-New Civic Hybrid|
| Tokyo, September 4, 2001 ---
Honda Motor Co., Ltd. today announced new technological advancements that
further improve the efficiency of its IMA (Integrated Motor Assist) System,
a unique hybrid system that significantly contributes to higher fuel efficiency.
An all-new hybrid car called the Civic Hybrid, to be released this fall,
will employ this latest hybrid technology.
The engine in the new IMA System will incorporate Honda's state-of-the-art i-DSI*1 lean-burn combustion technology, along with a newly-developed cylinder idling system that adapts Honda's VTEC variable valve control system to significantly increase the amount of electrical energy recovered during deceleration. These new features contribute to improved fuel economy.
Other technological advances provide increases in both motor assist system performance and Power Control Unit (PCU) efficiency. Combined with the Honda Multimatic S continuously variable automatic transmission, Athis new system achieves a combination of excellent drivability and superb gas mileage. At over 29km/l*2, this vehicle is at the top of its class for 5-passenger, mass-produced gasoline-engine vehicles, and meets fuel consumption standards for the year 2012. It also runs cleanly enough to be recognized by the Japanese Ministry of Transport as an Ultra Low-Emissions Vehicle.
Features of the New IMA System
The new IMA System employs a gasoline engine as its main power source, assisted by an electric motor as the need arises. It offers improved efficiency over the previous IMA System on which its design is based. The Insight, which was equipped with the previous IMA system, boasted the highest fuel economy in the world for a production vehicle.
During acceleration and other times of heavy engine load, the motor assist system contributes considerable torque, resulting in both lower fuel consumption and powerful acceleration. At cruising speeds when engine load is lower, the motor assist system shuts down. The newly developed 1.3-liter i-DSI lean-burn engine achieves the highest standard of fuel economy in the world.
During deceleration, the motor converts the dissipated energy into electricity (regenerative braking). The newly developed cylinder idling system reduces engine resistance during deceleration-formerly a problem with regenerative braking-greatly improving the vehicle's electrical regenerative efficiency.
When stopping, at traffic lights for example, the engine shuts off automatically, then restarts immediately when the driver steps on the accelerator pedal. This auto idle stop system contributes to both greater fuel efficiency and lower emissions.
New 1.3-liter i-DSI Lean Burn Engine
New Motor Assist System